Answer:
Aluminum is an element
Explanation:
Aluminum is the most abundant metal in the earths crust with an atomic number of 13.
If you were in Canada and purchased a 1 kg apple at the grocery,how many grams were in the apple?
Answer:
1000 gram
Explanation:
because mass is constant everywhere
i need to know what the summary of matter is helpppppp!!!!
Answer:
Matter can be classified according to physical and chemical properties. Matter is anything that occupies space and has mass. The three states of matter are solid, liquid, and gas. A physical change involves the conversion of a substance from one state of matter to another, without changing its chemical composition.
Explanation:
help? This is science btw
HELP ME PLZ
B
A
o
What is represented by letter B?
Answer:
Barium oxide, BaO, baria, is a white hygroscopic non-flammable compound
Explanation:
so the answer is BARIUM
HELP ME WITH THIS QUESTION PLEASE
ASAP
When a cup is placed on a table, which force prevents the cup from falling to the ground?
A gravitational force
B.
normal force
с.
resistance force
D.
tension force
Answer:
B. normal force
Explanation:
When a cup is placed on a table, the forces acting on the cup are the gravitational force and the normal force. The gravitational force acts in the downward direction while the normal force acts in an upward direction. It is clear that the gravitational force is balanced by the normal force. So, the correct option is (b) " normal force ".
______ is a way to slow down the reactions that spoil milk
Answer:
b. keeping milk cold
Explanation:
The cool temperature in the fridge will stop it from going to any further reactions so it won't get spoilt
d. Keeping milk warm can help in slowing down of the reaction that can spoil milk.
Pasteurization can be defined as the heat treatment process in which the heat is provided to a liquid for example milk to prevent the growth of microbes which are least resistant to the heat. This process destroy the microbes, their spores, and also prevent their colonization.This process is useful in preventing soreness of milk and extends its shelf life. Keeping milk in cold container, in a cold temperature, or away from other sources of food will not help in slowing down the reactions that spoil milk.Hence, d. Keeping milk warm can help in slowing down of the reaction that can spoil milk.
Learn more about milk:
https://brainly.com/question/22512463
60 N net force is applied to a 12 KG box. What is the acceleration of the box?
Answer:
The answer is
5 m/s²Explanation:
The acceleration of an object given it's mass and it's net force can be found by using the formula
[tex]acceleration = \frac{force}{mass} \\ [/tex]
From the question
force = 60 N
mass = 12 kg
So we have
[tex]acceleration = \frac{60}{12} \\ [/tex]
We have the final answer as
5 m/s²Hope this helps you
Which of the following metals is most reactive?
a. Mg
b. Rb
c. Cs
d. Li
Which of the following is NOT a characteristic of metals?
Answer:
brittle is not a characteristic of medals.
Which of the following did federalists oppose?
Answer:
The Federalists felt that this addition wasn't necessary, because they believed that the Constitution as it stood only limited the government not the people
Andrew walks through his garden and observes that the shapes of dewdrops are not always the same. Suppose he wants to investigate using the scientific method. Which questions are testable questions that he can ask to look into the reasons for the different shapes?
Answer: A, C, E
Explanation: PLATO. all testable questions.
List two things that do not change between isotopes of an element
Answer:
Explanation:
Because different isotopes have different numbers of neutrons, they do not all weigh the same or have the same mass. Different isotopes of the same element have the same atomic number. They have the same number of protons. The atomic number is decided by the number of protons.
Answer:
Because different isotopes have different numbers of neutrons, they do not all weigh the same or have the same mass. Different isotopes of the same element have the same atomic number. They have the same number of protons. The atomic number is decided by the number of protons.
A graduated cylinder is placed on an electronic balance, and the scale reads 78.32 g. 10.0mL of glycerine are added, and the scale reads 91.78 g. What is the density of glycerine
Answer:
1.346 g/mL
Explanation:
The density is defined as the mass of a substance per unit of volume.
In the problem, you add 10.0mL of glycerine. the mass change from 78.32g to 91.78g. The difference is the mass of the glycerine:
Mass glycerine: 91.78g - 78.32g = 13.46g
As the volume added was 10.0mL, the density, δ, in g/mL is:
δ =13.46g / 10.0mL =
1.346 g/mLLaboratory equipment is cleaned and properly stored after use primarily so that
Options are provided in the given question, so the complete question is as follows:
Laboratory equipment is cleaned and properly stored after use primarily so that —
A. chemical products can be measured and recorded as data
B. time is saved in setting up the next experiment
C. toxic materials can be kept in the laboratory
D. the possibility of contamination in the laboratory is minimized
Answer:
D. the possibility of contamination in the laboratory is minimized
Explanation:
After the completion of experiments, all the laboratory equipment should be cleaned and properly stored to minimize the possibility of contamination in the laboratory.
Any contamination in the laboratory can affect the experiment and will not give an accurate result, so it is important to clean and store the equipment properly.
Hence, the correct answer is "D".
110) Lake Michigan holds 1.3 x 10's gallons of water. If just Chicago removed water from the lake and it
never rained again, how many days would the water last? Chicago uses 1.2 x 109 gallons of water /day
gallons/day
You omitted what it was raised to the power in 1.3 x 10's gallons of water, so i will put it up as 1.3 x 10^15 gallons of water and solve with it
Answer:1,083,333 days
Explanation:
Total amount of water held by lake Michigan= 1.3 x 10^15 gallons of water
Amount of water Chicago uses per day =Chicago uses 1.2 x 10^9 gallons of water /day
Therefore,
Number of days water would last if it doesnt rain = Total gallons provided by lake Michigan/ Total gallons consumed per day
=1.3 x 10^15 gallons of water/ 1.2 x 10^9 gallons of water /day
= 1,083,333 days
HELP 100 POINTS explain how you would separate the components of a dirty water mixture that consists of: • coffee grounds • garlic powder • vegetable oil • sodium chloride (table salt) • gravel and sand • water. For each step discuss what separation method you are using and why you chose that method
Note that all detail explanation on why or how will be attached at the end
Step 1: Removing the Oil
Theoretically, step 1 and 2 can be alternated and preferably I would start with step 2, but I thought of one first. I would begin by setting up the liquid mixture in a funnel with a closed twist valve. Once the water mixture and oil has separated, I would slowly remove all the water, leaving the oil.
Step 2: Removing the Gravel and Sand
The second step is to filter out solids by using a sand filter. This filter is made by using a Styrofoam cup that has had small holes punched into the bottom with an open paperclip. The cup is filled with layers of clean washed gravel. The gravel will be layered by putting course gravel in the bottom and fine sand in the middle followed by course sand on the top. The gravel on the bottom stops the loss of sand out of the holes and the gravel on top stops the sand from washing out as a sample is poured.
Step 3: Removing the Coffee Grounds and Garlic Powder
You would start by lining a clean funnel with a coffee filter or something comparable. Then, you would add a spoonful or so of Charcoal to the funnel. Then you would pour the mixture of water, garlic powder, salt and coffee grounds into it.
Step 4: Removing Salt
You would preform a simple evaporation to remove the salt from the water. If the water is still needed, then you can preform a sealed distillation which has the same effect, but just keeps the water.
Step 5: Celebrate!
If you are doing this is a school, congratulations! you just finished your assignment/lab! If you are doing this in the wilderness for survival, congratulations! you won't die so soon!*
*The purification of water will not guarantee your extended survival in the wilderness, just extend the time in which you will not die of dehydration.™
Explanation:
Step 1 works because the density of oil and water are different, so as you let the liquid settle, the two liquids will separate into two sections. This allows you to funnel the water out. Step 2 work because the gravel and sand you want out cannot pass the sand-gravel filter you made (as long as it was made correctly) Step 3 works because the garlic powder and coffee grounds cannot pass the filter and the smell and colour that leaked into the water would be removed by the charcoal. Step 4 works because as water evaporates or is boiled off, the salt cannot evaporate with it, so it is left behind. Like how I was in the mall. Step 5 works because this was a long explanation and now you can go look at memes.
Why are models and a common set of units important for scientists?
Answer:
Explanation:
When researching a question in science, we collect data, interpret it, and share the results with other scientists. A common measurement system allows us to make direct comparisons instead of having to know things like how much a certain animal weighs.
Block A has a mass of 5g and a volume of 15mL. What is the density of block A? Will it float in water (density of water is 1.0 g/mL) Don't forget the units!! PLSSSS PLSSS PLSSS HELP I WILL MARK BRAINLIEST AND HELP WITH UR QUESTIONS I PROMISE!!!!
Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass of block = 5 g
volume = 15 mL
The density of the block is
[tex]density = \frac{5}{15} = \frac{1}{3} \\ = 0.33333333...[/tex]
We have the final answer as
0.33 g/mLThe block will float on water since it's density is less than that of water which is 1 g/mL
Hope this helps you
Write the noble gas configuration for nickel
Answer:
[Ar] 3d⁸ 4s²
Explanation:
Atomic number: 28
Symbol: Ni
Atomic mass: 58.6934 u
A neutral hydrogen atom is a special case as it can accept, remove, OR share
electrons during reactions with other atoms. If the electron is removed from
hydrogen, the remaining positive proton number in the atom is 1 and remaining
negative electron number is?
Answer:
The remaining negative electron number is 0.
Explanation:
1 - 1 = 0 since hydrogen has exactly 1 electron. The charge must be balanced if it is a neutral atom. The 1 electron got peeled off and the remaining number is 0. That means the hydrogen atom is a proton now.
An atom has a mass number of 19 and an atomic number of 9. What element is it? What is it’s symbol? How many protons, neutrons and electrons does it have? PLEASE HELP NEED ANSWER ASAP
Answer:
9 protons 9 electrons and 10 neutron
Explanation:
The atomic number is the number of protons .In a neutral atom,the number of electrons equals the number of protons.Mass number is the sum of the protons and nuetrons of a particular isotope.If you have mass number and atomic number,subtract the atomic number from the mass number to get the number of nuetrons. Mass number- atomic number= number of nuetrons
Which of the following units is NOT an official Sl unit?
A)meter
B)inches
C)second
D)kilogram
which best represents a particle containing 28 protons, 26 electrons,and 34 neutrons?
Answer:
This question lacks options, but the question can be answered based on knowledge of proton, electron and neutron number. The answer is:
62 Ni2+ particle
Explanation:
Nickel is a chemical element with atomic number 28. This means it has 28 electrons and 28 protons in its neutral atom. However, the isotope of nickel being described in the question has a mass number of 62. The mass number is calculated by adding the proton number with the neutron number. That is;
Mass number = number of protons + number of neutrons
Mass number = 28 + 34
Mass no. = 62
An element with mass number 62, which has lost two electrons to become positively charged (two positive charges) is described in the question. Hence, the particle that best fits this description is positively charged Nickel particle (Ni2+).
Ni2+ has 28 protons, 26 electrons (reduced by 2) and 34 electrons.
Note that, the 2+ charge is as a result of the loss of two electrons, hence, reducing the electron number by 2.
12. Which of the following species has the
least mass?
A. Electron C. Hydrogen ion
B. Helium atom D. Neutron
13. The mass number of an element whose
atom contains 13 electrons, 13 protons and
14 neutrons is
A. 13 B. 26 C. 27 D. 40
14. Which of the following elements exhibits
variable oxidation states and forms
12.electrons
13.13
14.aluminum has 14 neutron.
solve find the value of x
Answer:
50
Explanation:
2x+5=105
2x=100
2x/2=100/2
x=50
is this enough money for this question
A certain type of frog reproduces sexually and has 36 pairs of chromosomes in each of its body cells. How many chromosomes are in each of the frog’s sex cells?
Answer:
The answer is 36 on edgenuity.
What are the key differences between dependent and independent variables? *
Keeping in mind the rules for significant digits, what is the product of 0.8954 m and 2.98 m?
Answer: 3.240576
Explanation:
There are various ways of doing multiplication this is one of them
The wording "keep in mind the rules for significant digits" implies that we are to use these to show where the decimal place goes by approximating the answer. Then conducting the exact calculation.
Consider 0.8 as 8
×
1
10
3
×
8
×
1
10
=
2.4
So the solution is some where a bit above 2.4
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lets just use the numbers
Multiply both 0.8439 and 3.84 by 1000 to get rid of the decimal place. This makes thing more straight forward. So we end up with:
8439
×
38400
Split up the 38400 into 30000+ 8000 + 400
30000
×
8439
=
253170000
.
8000
×
8439
=
.
67512000
.
.
400
×
8439
=
.
.
3375600
−−−−−−−−−
←
Add
.
324057600
By our approximation we are expecting the form of
2.4
+
small amount
So the answer is
3.240576
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Check by calculator:
0.8439
×
3.84
=
3.240576
How many years are in 72,000 sec?
Answer:
72000 seconds equals 20 hours.
Explanation:
A different student is given a 10.0g sample labeled CaBr2 that may contain an inert (nonreacting) impurity. Identify a quantity from the results of laboratory analysis that the student could use to determine whether the sample was pure.
Answer:
Mass of Ca in sample, Mass of Br in sample, Number of moles of Ca in sample, Number of moles of Br in sample, Mass or moles of element other than Ca or Br in sample
Explanation:
The AP Classroom will not count your answer to this question as correct unless it includes at least one of the answers listed above. If you say that theanswer to this question is density, it will be marked as incorrect, I found that out the hard way when I used the answers that brainly gave me.
Good luck,
I applaud you for using the sources avalible to you, which is /definetly not/ cheeting.